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-12V转-20V和-24V电源

Other Parts Discussed in Thread: LM2576

我想找电源芯片,-12V转-20V和-24V,输出电流在10mA以上,电源文波最好优于100mV。

TI上看了有些升压芯片,输入和输出都是正压,不知道怎么用负压。请各位大佬给个意见,感激不尽!